Precious stone



FIG. 1 is a perspective view showing my new design;

FIG. 2 is a top plan view;

FIG. 3 is a front elevational view;

FIG. 4 is a bottom plan view;

FIG. 5 is a rear elevational view;

FIG. 6 is a left side elevational view; and,

FIG. 7 is a right side elevational view.

The ornamental design for a precious stone, as shown.